Group multiple devices

I'm using the WeMo Mini Smart plugs to control multiple lamps throughout the house. I'd like to controll a single room with a button and to do so I'd need to group a few of the Mini Smart Plugs into one. This is not currently an option on the Phone App. It appears the only grouping options is for their LED bulbs...

This would also make creating IFTTT rules much simpler as currently you can only select either "All Devices" or a single device.

An additonal help would be to have their own widgets so we don't have to open up the app every time we want to toggle lights on and off (or make IFTTT rules).

I've been hoping for this, too. I have the idea of multiple outlets with the same group name, one per room in my house, with a discreet spotlight plugged in each. If I hear someone trying to break in during the night, I'd like to be able to have my Echo turn on the entire group, so all rooms are lit up. I wouldn't use the group lights except in an emergency.

This Long Press rules work great. What I think we're looking for is a way to do the same thing from the app, not just from a physical switch. Would be ideal to great the equivalent of a Long Press Rule on the phone and have a button representing that group rule appear on the devices list so that the group can be toggled on/off from the app.